application-layer-setup

To structure the Application layer in a .NET clean architecture project, use CQRS patterns with base command and query abstractions, generic handlers, and pipeline behaviors for validation and logging to enforce separation of concerns.

Implementing CQRS in .NET applications involves using generic ICommand and IQuery interfaces alongside dedicated handlers. This approach separates read and write operations, ensuring testable handlers and scalable cross-cutting behaviors across queries and commands.

Handle cross-cutting concerns in CQRS handlers by using pipeline behaviors. These pipelines manage validation, performance tracking, logging, and transaction management consistently across all commands and queries without duplicating handler logic.

Abstracting DbContext in a clean architecture .NET application decouples data access from the domain. Using a dedicated DbContext interface abstraction in the Application layer ensures testability and maintains strict clean architecture boundaries.

You can enforce authentication and authorization contracts within the Application layer by defining specific authentication contracts. This keeps security rules centralized and consistent across all command and query execution paths.

You should avoid using CQRS for .NET applications with simple CRUD operations that do not benefit from strict separation of concerns. CQRS adds structural complexity that is only justified when scalable cross-cutting behaviors and testable handlers are required.